MdiContainer form not opening

private void buttonFormActivator_Click(object sender, EventArgs e)
{
    //Create parent and child forms    
    Form MyMdiParentForm = new Form();
    Form MyNewMdiChildForm = new Form();

    //Make Parent form an MDI container
    MyMdiParentForm.IsMdiContainer = true;
    // Set the Parent Form as the parent of the Child Form.
    MyNewMdiChildForm.MdiParent = MyMdiParentForm;
    //Display the Parent form
    MyMdiParentForm.Show();
    // Display the child form.
    MyNewMdiChildForm.Show();

    // Hide your initial form, 
    // take care to write a method
    // to close this form when you are
    // done with the application. (Like a while app active loop)
    this.Hide();
}